Cylinder-reboring machine



F. T. FLINCHBAUGH CYLINDER REBORING MACHINE Original Filed Dec. 14. 19202 SheetsSheet 1 Sept. 16, 1924. Re. 15,916

F. T. FLINCHBAUGH CYLINDER REBORING MACHINE Original Filed Dec. 14 19202 Sheets-SheeL 2- Reiuued Sept. 16, 1924. I Re. UNITED suresPATEN'roFFlce, v

r. rtmcnnnuon, or roux; rnnnsnvmn, nss'ronon. To WAYNE rooL Imnc'runnwoowner, or wnrmsssoxo, rnmwsnvem n conroanmion m Io. 1,488,001, datedBebmary 6, 1824, Serial No. 480,840,111 December 14, 18.80. Applicationfor reissue fled May 18, 1924. Serial 80. 112,886. T9 whom it mayconcern: a Figure isa perspective view showing the 55 tknpwn that I,Ennnnmox T. FLINQH- gear case and reducing ring in detail. W, a citizenof the. United States, resid- In carrying the invention into effect, '1using at York, in the county of York and employ a gear case havingabottom wall 5 State of Pennsylyania, have invented cer- 111 from whichde ends a bearing 12 and and useful Improvements in Oyl nsurroundingsaid ring, as particularly; dpp-Bgboring of which the folshownin Figure5 of the drawings, is an lowing is a specification annular centeringshoulderor bos inteas Th s invention relates to an. improved gral with,the bottom wall. Closing the gear y 10 g g rebe -11 g engine vcylindersand case is a cover 14 from which rises a bearas of its rincipal objectsto proing 15 alining with the bearing 12 and a portable ewice of thischaracter .journaled through these bearings is a feed w Army e securcdto an englne block screw 16 upon the lowercnd of which is an opera or,selectively reborlng the normally fixed a cutter 17. Since the exactcylinders of the block. w v manner in which the iced screw is operated,

llhe inyention as a further object to as well asthe construction of thecutter, ppgvide a m chine employing a separable does not concernthepresent invention, these l carry ng gear case and base, and details arenot brought out. Projecting uwherein, otter acylinder has been rebored,from the side wall of the gear case at op-- '2 casemay simpl be detachedfrom posits, sides thereof are apertured ears 19, j ,for removing thecutter from the the lower sides of which are flush with the cylinder 30:that the work may be inspected bottom wall 11. y I I s out detaching thebasefrom the engine In connection with the gear case 10 I proa: b k workis finally conlilpleted vide a cylindrical base 20. This base is v' LAnd the invention has as a. sti further provided with sight ,penings 21while from v to provide a machine em loying one the lower end of thebaseproiects a." pluso be for use in connection wit cylinders rality oflugs 22. As will be obseryed upon unto a certain diameter and a larger eeef n e o. Figure 2, the boss 13 f he M for use in connection withcylinders of gear caseis adapted n fit snugly within the larger diame erand wherein-means will be upper end of the base so that the gear case 1V prgvjded whereby the ear case may, be may thus rest upon the upper endedge l WW upon 'eit er base, thus d s-i of the base mating therewith and'project- K 1p Bin-Hg moth necessity for a separate igi from the base atits upper end are H m cm for each base. a a r ml Wpertuned ears 23adapted to register and incidental objects will appear with the ears1.9. Freely fitting through the v latter ears and-threaded intpthe earsof to the accompanying drawings, the base are cap bolts 24 rigidlysecuring w are made at art hereof andon which the gear case'upon thebase. reference 0 acters indicate similar In practice, the base is, assuggested in I ID M Figure 1, rested upon. an engine block over Figure lis a fragmentary side elevation oneof the cylinders therein, thebase'being, of my improved reborin machine showing of course, centeredwith respect to the the gear case of theme ine inconnection' cylinder.Bolts-are then arranged to coact withthesmaller oi-the bases'provided,between the lugs 22 and the block for firmly F'gurefit is a fragmentarysection particusecurlng the ass thereto. Accordingly, the

' larly showing the mounting of the gearcase feedscrew 16 may then-beoperated for ad- 1 upon thebase, vancin the cutter 17 andreboring thecylinj Figure 3 is a fragmentary side elevation der. fter the cutter haspassed through the 1' case in connection with the cylinder it is usuallynecessary to re- 0 hrger'oi ebases employed, I move the cutter andexamine the progress Figuneflis an enlarged fragmentary secof the work,In present construction 10 ionsp'u'tficularlyshowmg'thereducing ringthis may be accomplished by simply remqv employ'edin connection with thelarger of ing the cap bolts 24 and displac ng the gear WHOM and g case.Consequently, the centermg of the In Figures 3 and 4 of the drawi basewill be undisturbed so that-should it be found necessary to again passthe cutter through the cylinder, the gear case may be replaced, when thecutter will be accurately trued with respect to the cylinder.

For engine cylinders of small diameter,

the base will prove entirely adequate. However, it is necessary toemploy, in connection with engine cylinders above a certain size, alarger base adapted to accommodate a larger cutter. Consequently, toavoid the necessit of em loying an individual gear case r each base Ihave provided means whereby a single gear case may be used not only inconnection with the base 20 but also in connection with a larger baie. tno larger base is indicated at 25. The base is substantially identicalstructurally with thel base 20, the bases varying in proportions on y.formed with eight openings 26 corresponding to the sight openings 21,while at the lower end of said base is rovided a lurality of lugs 27correspon ing to the 'ugs 22. Projecting from the upper end of thelarger base, at op ite sides thereof, are opposltely dispose respondingto the ears 19 of the base 20. A reducing ring 29 is employed. This ringis formed to seat against the up er end edge of the base mating therewitand is, as

articularly shown in Figure 5, provided at its lower side with anannular shoulder or centering boss 30 adapted to fit snugly within thebase. Projecting from the ring at opposite sides thereof are aperturedears 31 disposed to mate with the ears 28 and freely fitting through theears of the ring and threaded: into the cars 28 are cap bolts 32 rigidlysecuring the ring in position. The ring is of an internal diameter toreceive snugly the 10 so that, as shown in Figure 4, the gear case maybe rested against the upper edge of the ring mating therewith, the bossprojecting into the ring. Formedin the ring at the plane of the ears 31are threaded openings 33 adapted to register with the cars 19 of thegear case and freely fitting through said ears and threaded into theseopenings are the cap bolts 24. Thus, the gear casewill be securely fixedupon the larger base so that a larger cutter may be employed inconnection with the feed screw. To displace the gear case and withdrawthe cutter, the ring 29 may be detached, leaving the base secured to thecylinder block centered with respect to the cylinder being rebored.Accordingly, just as when the smaller base is employed, the work may beinspected without molesting the centering of the base so that when thering is replaced, the reboring operation may immediately progress.

As will be observed, the base 25 is gear case may be apertured cars 28corto ether, a base boss 13 of the gear case said in- Having thus fullydescribed m desire to diameter than said first base, an adaptervintended to be inserted between said second base and said gear case andhavin a bore of the same diameter as said first ase and a seat of thesame diameter as the second base adapted to fit the bore thereof; meansfor rigid y securing said adapter to said second base, and tappedapertures provided in said adapter for said bolts, whereb the shiftedfrom sai first ase to said second base and attached to said adapter,substantially as set forth.

2. In a cylinder reboring machine, a boring head, a gear casecarryingthe boring head, a cylindrical base having means for attachmentto a cylinder block with its bore in alinement with a cylinder,interfitting I means on the gear case and the base for alining theboring head with said cylinder, means for securing the case and the headsimilar to the first having a re of larger interfitting means on thering an the'second base for locating said ring coaxially with said base,and means for securing the case and the base rigidly together,substantially as set forth.

3. In a cylinder reboring machine, a borinig head, a gear case carryingthe head, an a a ter ring, means for securing the ring to t e gear case,a plurality of bases difiering in size, means for securing one of saidbases directly to the gear case, means for securing a larger base to theadapter ring, centering means on the gear case the adapter rin and saidbases whereby the parts are guided into concentric relation to theboring and means for securing either base:

to a cylinder block with said head coaxial with a cylinder,substantially as set forth.

4. In a cylinder reboring machine, a borinig head, a gear case carryingthe head, an a apter ring, means for securing the ring to the gear case,a plurality of bases difiering 1n size, means for securing one of saidbases directly to the gear case, means for securing a larger base to theadapter ring, concentric shoulders on the gear case the adapter ring andsaid bases whereby the parts are guided into concentric relation to theborlng head, and means for securing the bases to a cyl nder block withsaid head diameter, an ada ter ring,

gofial with a cylinder, substantially as set 5. In a cylinder reboringmachine, a. borhead, a gear case carrying the head, an

6 pter ring, means for securl the r' the gear case, a plurality of asesdi ering in size, means for securing one of said bases directly to thegear case, means for securing a larger base to the adapter ring,

10 centering means on the gear case the adapter an said bases wherebythe parts are ed into concentric relation to the borto a cylinder blockwith said tov twen

